Possible Tranny slippage

[pooty]

I just changed my transmission fluid in my M, and I used Mopar ATF +4. It also recommended that I add a bottle of Lube Guard (purchased from Napa). Since I've changed the fluid, it's much harder to smoke the tires. Seems like it's slipping! Anyone have any experience on this topic

[J-Roc]

How many miles on the trans? make sure the fluid level is correct. Too much or too little will cripple the trans...

[pooty]

The tranny has 121,000 miles on it. The fluid level is perfect. I've changed the fluid 3 times since removing the tranny additive. Everything seems perfect now. I'll never add anything to this tranny again. Only Mopar ATF +4 will be added from now on.